Chamber of Sages

{t}: Add {2}. At the beginning of the next end
step, if this mana was not used to cast a
Legendary creature, Chamber of the Sages deals 3 damage to you.
At the beginning of your upkeep, pay {1} or
sacrifice Chamber of Sages.
Home to the council of the Sages, it is the only safe
haven from Ganondorf's malice.